Restore PWA installability.

- Remove `sw.js`, too lazy to debug it. Nora doesn't care if PWA assets are
  cached.

index.html

@@ -75,14 +75,6 @@
     <link rel="stylesheet" href="style.css" />
 
     <!-- Javscript -->
-    <script>
-      if ("serviceWorker" in navigator) {
-        window.addEventListener("load", () => {
-          navigator.serviceWorker &&
-            navigator.serviceWorker.register("./sw.js");
-        });
-      }
-    </script>
     <script defer src="./main.js"></script>
   </head>
 

main.js

@@ -97,6 +97,10 @@ function choose(array) {
  * computers failing for no discernible reason.
  */
 async function initializeGame() {
+  // Preload the CSS background texture.
+  await getImage("forest-tile-512x512.jpg");
+
+  // Preload all the "game assets."
   rockSounds = await Promise.all(rockSoundsFiles.map(getSound));
   rockImages = await Promise.all(rockImagesFiles.map(getImage));
   bugClickSounds = await Promise.all(bugClickSoundsFiles.map(getSound));

manifest.json

@@ -1,6 +1,6 @@
 {
   "name": "Nora Looks For Bugs",
-  "short_name": "Nora Looks For Bugs",
+  "short_name": "NoraBugs",
   "display": "standalone",
   "start_url": "./?utm_source=pwa_install",
   "scope": ".",